The population of Leavetown was 123000 in the year 2000 the population kept increasing at a yearly rate of 3.75% for 10 years. After that, due to exconomic slowdown, the population starts to decrease at a yearly rate of 2.5%. a. Write a mathmatical model (equation) to represent the population change in Leavetown. (Hint: you need to use a piecewise-defined function for your model)

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